protasis
Concise Oxford English Dictionary © 2008 Oxford University Press:
protasis /ˈprɒtəsɪs/
▶noun (pl. protases /-siːz/) Grammar the clause expressing the condition in a conditional sentence (e.g. if you asked me in if you asked me I would agree). Contrasted with apodosis.
– origin C16: via L. from Gk protasis ‘proposition’.
'protasis' also found in these Oxford entries:

